PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117 TCL1117-2.85 TCL1117-2.85 TCL1117-3.30 TCL1117-3.30 TCL1117-5.00 TCL1117-5.00 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V FEATURES GENERAL DESCRIPTION ■ ■ The TCL1117 is a low-dropout positive voltage regulator (LDO) with 800mA output current capability. It is available in fixed and adjustable output voltage versions, 2.85V (active SCSI terminators), 3.30V and 5.00V. Output/reference voltage accuracy is guaranteed to ±1.0%. Over-current protection is integrated onto the chip. Dropout is specified at 1.2V maximum at full rated output current and less than 1.0V at low loads (<100mA). The SOT-223 package makes the TCL1117 especially attractive for tight physical layouts. For stability, a 10µF output capacitor is required. The TCL1117 is an NPN-based design which has significantly lower unused quiescent current than similar PNP-based regulators. ■ ■ ■ ■ ■ ■ Space-saving SOT-223 Package Pin Compatible with Older Adjustable 3 Terminal Regulators Adjustable or Fixed Voltages of 2.85V, 3.30V or 5.00V High Output Current ..................................... 800mA Low Dropout Voltage ............ 1.2V at IOUT = 800mA Guaranteed Dropout Voltage at Multiple Current Levels Line Regulation (Max) ...................................... 0.2% Load Regulation (Max) ..................................... 0.4% APPLICATIONS ■ ■ ■ ■ ■ Active SCSI Terminators High Efficiency Linear Regulators Post Regulators for Switching Supplies Battery Chargers 5V - 3.3V Linear Regulators PIN CONFIGURATIONS SOT-223 3-Lead Package DDPAK-3 FRONT VIEW FRONT VIEW TAB IS VOUT IN OUT ADJ/GND *Ambient temperature range is determined by maximum operating power dissipation and a maximum die temperature of 125°C (see Power Dissipation and Thermal Design Section). 1 2 3 IN 1117 11172 11173 11175 OUT SOT-223-3 SOT-223-3 SOT-223-3 SOT-223-3 DDPAK-3 DDPAK-3 DDPAK-3 DDPAK-3 ADJ/GND TCL1117-ADJCDB TCL1117-2.85CDB TCL1117-3.30CDB TCL1117-5.00CDB TCL1117-ADJCEB TCL1117-2.85CEB TCL1117-3.30CEB TCL1117-5.00CEB Part Marking 3 Package 2 Part Number* 1 ORDERING INFORMATION TYPICAL APPLICATION 110Ω IN TCL1117-5.00 OUT 110Ω GND 4.75V to 5.25V 10µF Active Terminator for SCSI-2 Bus TCL1117-05 6/5/97 1 specifications of its devices. TelCom Semiconductor reserves the right to make changes in the circuitry and 22µF 110Ω 18 to 27 LINES PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 Storage Temperature ............................ – 65°C to +150°C Lead Temperature (Soldering 10 sec) .................... 300°C ABSOLUTE MAXIMUM RATINGS* Input Voltage Operating Voltage: TCL1117, TCL1117-3.30, TCL1117-5.00 ...... 15V TCL1117-2.85 ................................................10V Surge Voltage: TCL1117, TCL1117-3.30, TCL1117-5.00 ...... 20V Operating Junction Temperature ............... 0°C to +125°C *Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS Symbol Parameter Reference Voltage Output Voltage Test Conditions TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 Line Regulation Load Regulation TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 Dropout Voltage Current Limit Minimum Load Current Quiescent Current TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 Thermal Regulation Ripple Rejection Adjust Pin Current Adjust Pin Current Change Temperature Stability Long Term Stability RMS Output Noise Thermal Resistance Min Typ Max Unit IOUT = 10mA, (VIN – VOUT) = 2V, TJ = 25°C 10 ≤ IOUT ≤ 800mA, 1.4V ≤ (VIN – VOUT) ≤ 10V (Note 1) IOUT = 10mA, VIN = 4.85V, TJ = 25°C 0 ≤ IOUT ≤ 800mA, 4.25V ≤ VIN ≤ 10V (Note 1) 0 ≤ IOUT ≤ 500mA, VIN = 3.95V (Note 1) IOUT = 10mA, VIN = 5.3V, TJ = 25°C 0 ≤ IOUT ≤ 800mA, 4.75V ≤ VIN ≤ 10V (Note 1) IOUT = 10mA, VIN = 7V, TJ = 25°C 0 ≤ IOUT ≤ 800mA, 6.50V ≤ VIN ≤ 12V (Note 1) IOUT = 10mA, 1.5V ≤ VIN – VOUT ≤ 15V (Notes 1 & 2) IOUT = 0mA, 4.25V ≤ VIN ≤ 10V (Notes 1 & 2) IOUT = 0mA, 4.75V ≤ VIN ≤ 15V (Notes 1 & 2) IOUT = 0mA, 6.5V ≤ VIN ≤ 15V (Notes 1 & 2) (VIN – VOUT) = 3V, 10mA, ≤ IOUT ≤ 800mA (Notes 1 & 2) VIN = 4.25V, 0 ≤ IOUT ≤ 800mA (Notes 1 & 2) VIN = 4.75V, 0 ≤ IOUT ≤ 800mA (Notes 1 & 2) VIN = 6.5V, 0 ≤ IOUT ≤ 800mA (Notes 1 & 2) IOUT = 100mA, (Note 1 & 3) IOUT = 500mA, (Note 1 & 3) IOUT = 800mA, (Note 1 & 3) (VIN – VOUT) = 5V, TJ = 25°C (VIN – VOUT) = 15V (Note 1 & 4) 1.238 1.225 2.820 2.790 2.790 3.265 3.230 4.950 4.900 — — — — — — — — — — — 800 — 1.250 1.250 2.850 2.850 2.850 3.300 3.300 5.000 5.000 0.035 1 1 1 0.1 1 1 1 1.00 1.05 1.10 950 1.7 1.262 1.270 2.880 2.910 2.910 3.335 3.370 5.050 5.100 0.2 6 7 10 0.4 10 12 15 1.10 1.15 1.20 1200 5 V VIN ≤ 10V (Note 1) VIN ≤ 15V (Note 1) VIN ≤ 15V (Note 1) TA = 25°C, 30msec Pulse fRIPPLE = 120Hz (VIN – VOUT) = 3V, VRIPPLE = 1Vp-p ( Note 1) (Note 1) 10mA ≤ IOUT ≤ 800mA, 1.4V ≤ (VIN – VOUT) ≤ 10V (Note 1) — — — — 60 — — — — — — 5 5 5 0.01 75 55 0.2 0.5 0.3 0.003 15 10 10 10 0.1 — 120 5 — — — — TA = 125°C, 1000 Hrs. (% of VOUT), 10Hz ≤ f ≤ 10kHz (Junction to Case, at Tab) V V V % mV % mV V mA mA mA %W dB µA µA % % % °C/W NOTES: 1. Specifications apply over the full operating temperature range. 2. See thermal regulation specification for changes in output voltage due to heating effects. Load regulation and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 3. Dropout voltage is specified over the full output current range of the device. Dropout voltage is defined as the minimum input/output differential measured at the specified output current. Test points and limits are also shown on the Dropout Voltage curve. 4. Minimum load current is defined as the minimum output current required to maintain regulation. TCL1117-05 6/5/97 2 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 currents can be high enough to damage the chip. In this case, a high-current, fast-response diode is recommended. (See Figure 1). APPLICATIONS Overload Protection The TCL1117 is protected against current (short-circuit) and thermal overload conditions. Thermal protection is triggered by a chip temperature exceeding 165°C. Current overload is triggered at approximately 950mA. Output Voltage Adjust Like most LDOs, the TCL1117 regulates the output by comparing the output voltage, or a multiple thereof, to an internally generated reference voltage. On the adjustable version, the VREF is available externally as 1.25V (±1%) between VOUT and ADJ (See Figure 2). The voltage divider formed by R1 and R2 should be set to conduct 10mA (minimum output load). The output voltage is given by the following equation: Stability and Load Regulation The TCL1117 requires a capacitor from VOUT to GND to provide compensation feedback to the internal gain stage. This is to ensure stability at the output terminal. Typically, a 10µF tantalum or 50µF aluminum electrolytic is sufficient. NOTE: It is important that the ESR for this capacitor does not exceed 0.5Ω. The output capacitor does not have a theoretical upper limit and increasing its value will increase stability. COUT = 100µF or more is typical for high current regulator designs. NOTE: See Protection Diodes for limitations. Another benefit of larger output capacitance is improved transient load response (large di/dt in the load). VOUT = VREF R2 + I (1+ R1 ) ADJ R2 On fixed voltage versions of the TCL1117, the voltage divider is provided internally. Load Regulation The TCL1117 load regulation is limited by the resistance of the wire connecting it to the load (Rp, Figure 3). For the adjustable version, the best load regulation is accomplished when the top of the resistor divider (R1) is connected directly to the output pin of the TCL1117, NOT to the high side of the load (Figure 3). When so connected, Rp is not multiplied by the divider ratio. For the fixed output versions, the top of R1 is internally connected to the output and the ground pin can be connected to the low side of the load as a negative side sense if, so desired. Protection Diodes Typically no protection diodes are necessary for the TCL1117. Unlike older regulators, the ADJ pin is protected internally from excessive currents. The ADJ pin can be driven with voltage transients as high as ±25V with respect to the output without damage to the device. Likewise, a diode between the input and output is not typically required. If the input voltage collapses the internal circuitry can absorb ~20A transient currents (<10µsec) without damage. This reverse current is much larger than most power supply designs can generate. However, if the output capacitor is VERY large (>1000µF), instantaneous D1 1N4002 (OPTIONAL) VIN VIN IN TCL1117 VOUT OUT ADJ + R1 + TCL1117 ADJ COUT 150µF ( VOUT = VREF 1+ R2 R1 CADJ 10µF VOUT OUT VREF R1 IADJ 50µA ) + IADJ R2 R2 Figure 2. Basic Adjustable Regulator Figure 1. TCL1117-05 6/5/97 IN 3 R2 PRELIMINARY INFORMATION TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V Table 1. IN VIN TCL1117 ADJ OUT R1 CONNECT R1 TO CASE Thermal Resistance Copper Area Rp PARASITIC LINE RESISTANCE RL R2 Topside* Backside Board Area (Junction-to-Ambient) 2500 Sq. mm 2500 Sq. mm 2500 Sq. mm 45°C/W 1000 Sq. mm 2500 Sq. mm 2500 Sq. mm 45°C/W 225 Sq. mm 2500 Sq. mm 2500 Sq. mm 53°C/W 100 Sq. mm 2500 Sq. mm 2500 Sq. mm 59°C/W 1000 Sq. mm 1000 Sq. mm 1000 Sq. mm 52°C/W 1000 Sq. mm 0 1000 Sq. mm 55°C/W *Tab of device attached to topside copper CONNECT R2 TO LOAD Soldering Methods The recommended methods of soldering the SOT-223 package are: vapor phase re-flow and infrared re-flow with component preheat within 65°C of the solder temperature. Hand soldering and wave soldering methods are not recommended since they can damage the part with excessive thermal gradients across the surface area of the package. Thermal shock to the package (>30°C per second) must be minimized. Figure 3. Connections for Best Load Regulation Power Dissipation and Thermal Design As mentioned earlier, the TCL1117 has thermal overload protection which limits internal temperature to +165°C. However, device functionality is only guaranteed to a maximum junction temperature of +125°C. Since internal power dissipation can be >1 watt, careful thermal design is essential. The TCL1117 is supplied in a SOT-223 package which is intended to be directly surface-mounted to the PC-board. Because there is no dedicated heat sink, power dissipation to ambient is performed largely by the PC board and its copper material. The power dissipation and junction temperature for the TCL1117 in a SOT-223 are given by the following equations: Ripple Rejection Ripple Rejection curves were generated using an adjustable output TCL1117 with a bypass capacitor from ADJ to ground. To obtain the performance shown in the curves, the impedance of the bypass capacitor (at the ripple frequency) should be less than R1. R1 is typically 100Ω to 200Ω. For example at 120Hz, with R1 = 100Ω, the adjust capacitor should be at least 13µF. Only 0.16µF would be required at 10kHz. The output ripple increases as the ratio of the output voltage to the reference voltage (VOUT/VREF) in fixed voltage devices, and adjustable devices without an adjust pin capacitor. For example, at 5V, output ripple will increase by a factor of 4 (5/1.25V). Ripple rejection will be reduced by 12db from the value shown on the curve. PD = (VIN – VOUT) x (IOUT) TJUNCTION = TAMBIENT + (PD x ΘJA) NOTE: TJUNCTION must not exceed 125°C The ΘJC (junction to external tab) for the SOT-223 is 15°C/W. Depending upon heatsink parameters, the ΘCA can be as low as 30°C/W. Therefore, the total thermal resistance (ΘJA) is at least 45°C/W. Table 1 shows thermal resistance measurements taken with the TCL1117 mounted on 1/16 inch 2-layer PCB with 1oz. copper foil. NOTE: The TAB pin does not have to be soldered to all copper layers for effective heat transfer. Use Table 1 only as a rough guide since thermal interactions with adjacent components cannot be predicted. TCL1117-05 6/5/97 4 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 TYPICAL APPLICATIONS 1.2V-10V Adjustable Regulator VIN IN + TCL1117 ADJ 5V Regulator with Shutdown VIN VOUT** OUT R1 121Ω + C1* 10µF IN 5V OUT TCL1117 ADJ + 121Ω 1% + 10µF C2 100µF 1k 2N3904 SHDN R2 1k 100µF 365Ω 1% 1k * NEEDED IF DEVICE IS FAR FROM FILTER CAPACITORS ** VOUT = 1.25V 1+ R2 R1 ( ) Remote Sensing Rp (MAX DROP 300mV) VIN IN TCL1117 ADJ OUT 100µF 7 25Ω + 6 – 2 RL LM301A 1kΩ + 3 1 8 121Ω 10µF OUTPUT 5V VIN + 4 5µF 100pF 365Ω + RETURN 25Ω RETURN Battery Charger Adjusting Output Voltage of Fixed Regulators IF IN TCL1117-5.00 OUT VIN > 12V 10µF + GND 5V TO 10V + VIN IN TCL1117 OUT 1.25V 100µF ADJ 10µF* + R2 1k *OPTIONAL IMPROVES RIPPLE REJECTION TCL1117-05 6/5/97 R1 (1+ R2 ) R1 – RS (1+ R2 ) R1 VOUT – 1.25V IF = IF = VOUT 5 VOUT RS 1 – RS (1+ R2 ) R1 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 TYPICAL APPLICATIONS (Cont.) Improving Ripple Rejection Battery Backed Up Regulated Supply VIN 10µF + IN TCL1117-5.00 OUT GND VIN 5.2V LINE 5.0V BATTERY 10µF IN VIN ≥ 16.5V TCL1117 OUT + R1 121Ω 1% ADJ 150µF 50Ω SELECT FOR CHARGE RATE + 6.5V IN TCL1117-5.00 OUT GND *C1 IMPROVES RIPPLE REJECTION. XC SHOULD BE ≈ R1 AT RIPPLE FREQUENCY R2 365Ω 1% + C1* 10µF + 100µF 10µF High Efficiency Dual Supply FEEDBACK PATH MUR410 3.3V OUTPUT (TYPICAL) + 470µF MUR410 TCL1117-5.00 OUT GND IN + +5V 0.5A + 470µF + VIN 10µF 1N4002 10µF 1N4002 MUR410 SWITCHING REGULATOR IN + TCL1117-5.00 OUT GND 470µF + –5V 0.5A Low Dropout Negative Supply VIN + IN TCL1117-5.00 OUT GND 10µF 100µF VOUT = –5V FLOATING INPUT TCL1117-05 6/5/97 + 6 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 TYPICAL CHARACTERISTICS Minimum Operating Current (Adjustable Device) Dropout Voltage (VIN - VOUT) 4 MINIMUM OPERATING CURRENT (mA) 1.4 DROPOUT VOLTAGE (V) 1.2 TJ = 25°C 1.0 TJ = 125°C 0.8 0.6 0.4 0.2 INDICATES GUARRANTEED TEST POINT 0.0 0 100 200 300 400 500 600 700 800 3 TJ = 125°C TJ = 25°C 2 TJ = –55°C 1 0 0 5 OUTPUT VOLTAGE DEVIATION (%) SHORT CIRCUIT CURRENT (A) 1.00 TJ = 25°C 0.75 0.50 0.25 0 ∆ ILOAD = 800mA 0.05 0 -0.05 -0.10 -0.15 -0.20 0 5 10 15 -50 -25 INPUT/OUTPUT DIFFERENTIAL (V) RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) 70 50 (VIN – VOUT) ≥ 3V CADJ = 200µF AT f < 60Hz CADJ = 25µF AT f > 60Hz IOUT = 0.5A 10 100 1k 10k fRIPPLE = 120kHz 80 VRIPPLE ≤ 3Vp-p 70 60 fRIPPLE = 20kHz 50 VRIPPLE ≤ 0.5Vp-p 40 30 VOUT = 5V CADJ = 25µF COUT = 25µF 20 10 0 100k 0 FREQUENCY (Hz) TCL1117-05 6/5/97 75 100 125 90 60 30 50 100 80 40 25 TCL1117 Ripple Rejection vs. Current VRIPPLE ≤ 0.5Vp-p VRIPPLE ≤ 3Vp-p 90 0 TEMPERATURE (°C) TCL1117 Ripple Rejection 100 0 20 0.10 TJ = 125°C 20 15 Load Regulation Short-Circuit Current 1.25 10 10 INPUT/OUTPUT DIFFERENTIAL (V) OUTPUT CURRENT (mA) 0.2 0.4 0.6 OUTPUT CURENT (A) 7 0.8 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 TYPICAL CHARACTERISTICS (Cont.) Temperature Stability Adjust Pin Current 100 90 80 ADJUST PIN CURRENT (Aµ) OUTPUT VOLTAGE CHANGE (%) 2.0 1.0 0 -1.0 70 60 50 40 30 20 10 0 -50 -25 -2.0 0 25 50 75 100 125 150 CIN = 10µF COUT = 10µF TANTALUM VIN = 4.25V PRELOAD = 0.1A 0.5 0 -0.5 0 10 20 30 40 50 60 70 80 90 100 TIME (µsec) 0.2 0.1 0 CIN = 10µF COUT = 10µF TANTALUM VIN = 6.5V PRELOAD = 0.1A -0.1 -0.2 0.5 0 -0.5 0 10 20 30 40 50 60 70 80 90 100 TIME (µsec) OUTPUT VOLTAGE DEVIATION (mV) TCL1117-5 Line Transient Response CIN = 1µF COUT = 10µF TANTALUM IOUT = 0.1A 0 -20 INPUT VOLTAGE (V) INPUT VOLTAGE (V) OUTPUT VOLTAGE DEVIATION (mV) TCL1117-2.85 Line Transient Response 20 -40 5.25 4.25 3.25 0 20 40 60 80 100 120 140 160 180 200 60 CIN = 1µF COUT = 10µF TANTALUM IOUT = 0.1A 40 20 0 -20 -40 7.50 6.50 5.50 0 TIME (µsec) TCL1117-05 6/5/97 100 125 150 0.3 OUTPUT VOLTAGE DEVIATION (V) 0 40 75 TCL1117-5 Load Transient Response 0.1 60 50 TCL1117-2.85 Load Transient Response 0.2 -0.2 25 TEMPERATURE (°C) 0.3 -0.1 0 TEMPERATURE (°C) LOAD CURRENT (A) LOAD CURRENT (A) OUTPUT VOLTAGE DEVIATION (V) -50 -25 20 40 60 80 100 120 140 160 180 200 TIME (µsec) 8 PRELIMINARY INFORMATION 800mA LOW DROPOUT POSITIVE REGULATORS ADJUSTABLE AND FIXED 2.85V, 3.30V, 5.00V TCL1117 TCL1117-2.85 TCL1117-3.30 TCL1117-5.00 PACKAGE DIMENSIONS SOT-223 .264 (6.70) .248 (6.30) .122 (3.10) .114 (2.90) .287 (7.30) .146 (3.70) .264 (6.70) .130 (3.30) .041 (1.04) .033 (0.84) .090 (2.30) TYP. .031(0.80) .024 (0.60) .071 (1.80) MAX. .014 (0.35) .009 (0.24) 10° MAX. .004 (0.10) .0008 (0.02) .181 (4.60) TYP. .036 (0.91) MIN. .183 (4.65) .170 (4.32) .410 (10.41) .385 (9.78) DDPAK-3 .067 (1.70) .045 (1.14) .055 (1.40) .045 (1.14) 3° - 7° (5x) .370 (9.40) .329 (8.38) .010 (0.25) .000 (0.00) .605 (15.37) .549 (13.95) 0.26 (0.66) 0.14 (0.36) .051 (1.30) .049 (1.24) .110 (2.79) .068 (1.72) .037 (0.94) .026 (0.66) 0° - 8° .100 (2.54) TYP. Dimensions: inches (mm) Sales Offices TelCom Semiconductor 1300 Terra Bella Avenue P.O. Box 7267 Mountain View, CA 94039-7267 TEL: 415-968-9241 FAX: 415-967-1590 E-Mail: [email protected] TCL1117-05 6/5/97 TelCom Semiconductor Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236 9 TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957 Printed in the U.S.A.